Manufacture of compositions or preparations with cellulose derivatives



Patented Mar. 6, 1928.

UNITED STATES PATENT OFFICE.

HENRY DREYI'US, OF LONDON, ENGLAND.

MANUFACTURE OF COMPOSITIONS OB PREPARATIONS WITH CELLULOSE DERIVATIVES.

Ho Drawing. Application illed May 26, 1923, Serial No. 641,761, and in Great Britain July 18, 1am.

This invention relates to the manufacture of celluloid-like materials, photographic or other films or sheets, dopes, varnishes or other compositions, solutions or prepara- 5 tions (all hereinafter included in the term composition of matter) made with methyl cellulose. ethyl cellulose, benzyl cellulose or other ethers of cellultise, associated with plasticising agents.

Various substances have been proposed as plasticising agents for cellulose ethers for the manufacture of compositions, preparations or solutions such as referred to.

It has now been found that the substance known as chloretone or trichlorotertiary butyl alcohol (1.1.1.trichloro.2.methylpropanol 2), which can be readily obtained by condensation of acetone and chloroform, is a good solvent and plasticiser for methyl cellulose, ethyl cellulose, benzyl cellulose and other celluose ethers. This substance has a high boiling point (about 167 C.) and a high vapour tension at ordinary temperature; it is insoluble, or but very little soluble in water and has a melting point about 9697 C. It is soluble in numerous organic solvents, e. g. acetone, ethyl acetate,

alcohol and chloroform. With its aid plas tic, celluloid-like materials can be made which are elastic and tough and closely approach in desirable properties to nitrocellulose celluloid. This. plasticiser is also practically non-inflammable, which is a further advantage for the manufacture of C81: luloid-like material's, films, or. other comositions or preparations of low inflamma-v Example 1.

parts of ethyl or benzyl cellulose and Example 2.

70 parts of ethyl or benzyl cellulose are dissolved in a mixture of'about 7 parts of chloretone and about 350-650 parts of acetone to form a solution which may be used as a varnish, or for runningto form a film.

Larger or smaller proportions of the chloretone may be employed. Also other plasticisers, filling materials, volatile or nonvolatile solvents or liquids, softening or suppling agents, substances for reducing inflammability, filling materials, colouring matters and so forth (all hereinafter in the claims included in the term added material) may be added according to the character. of product desired or other circumstances. Also it is of course understoodthat mixtures of or containing more than one cellulose ether may be used.

It is understood that the chloretone may be employed, with cellulose ethers in the,

manufacture of films or sheets, or in dope or varnish solution, in order to improve the quality of the film or coating left after evaporation of the volatile solvents or liquids usually employed therein, and that it may be employed generally in the manufacture of plastic masses, compositions, films,

solutions or preparations made with cellulose ethers.

What I claim and desire to secure by Letters Patent is 1. A composition of matter comprising a cellulose ether and trichloro tertiary butyl alcohol. I

2. A composition of matter c'om rising a cellulose ether, trichloro tertiary hut'yl alcohol and other plasticisers.

3. A composition of matter com rising a cellulose ether. trichloro tertiary E cohol, other 'plasticisers and substances for reducing inflammability of the mixture.

4. A com osition of matter comrising a cellulose et er, trichloro tertiary utyl alcohol, other plasticisers, substances for re ducing infiammability of the mixture and. added solvents.

5. A composition of matter com rising a cellulose ether, trichloro tertiary utyl alutyl alethyl cellulose, trichloro tertiary butyl alcohol and other plasticisers.

8. A composition of matter comprising ethyl cellulose, trichloro tertiary butyl al-- cohol, other plasticisers and substances for reducing inflammability of the mixture.

9. A' composition of matter comprising ethyl cellulose, trichloro-tertiary butyl alcohol and a liquid solvent of the ethyl eel-' lulose.

10. A composition of matter comprising about 70 partsof "ethyl cellulose and about 30 parts of trichloro tertiary butyl alcohol.

11. A composition of matter comprising 20 a cellulose ether, trichloro tertiary .butyl alcohol and acetone.

12. A composition of matter comprising ethyl cellulose, tric-hloro tertiary butyl alcohol and acetone. 25

In testimony whereof I have hereunto subscribed; by name.

HENRY DREYFUS. 

